Why Does My Furnace Keep Blowing Fuses?

Feb 18, 2020 | Furnace, Heating

Inside your furnace, there are several fuses. These fuses serve a variety of necessary and essential functions. Since there are so many of them, and since they are continually working to ensure that your furnace works properly, it is inevitable that you will occasionally have to deal with a blown fuse. This isn’t a serious issue unless it begins to happen on a regular basis. If fuses are blowing continually, it can indicate that there is a serious problem somewhere within your HVAC system. That’s where Xenia Heating & Air comes in. Located in Xenia, Ohio, we are available 24 hours a day, 7 days a week, 365 days a year to ensure that your furnace is working properly and safely. 

Reasons Your Furnace is Blowing Fuses in Xenia, Ohio 

Poorly Connected Wiring 

Blown fuses can be caused by poorly connected, damaged, or loose wiring. These issues can cause your furnace to short-circuit. Faulty wiring is a serious issue not just because it can cause frequently blown fuses, but it is also a dangerous fire hazard. A professional HVAC technician from Xenia Heating & Air can inspect your system and determine if there is an issue with the wiring. If there is, repair work can begin right away. 


A Malfunctioning Thermostat 

There are some types of thermostats that have a metal frame. If the wires inside of these thermostats come into contact with the framework or with one another, the voltage can increase to a level that the wiring is unable to maintain. This causes the furnace’s control board to overload and blow out. When this happens, the furnace’s draft inducer will no longer operate. The draft inducer is a necessary component of the furnace. It is located near the heat exchanger and is responsible for removing any remaining combustible gases that may linger from your system’s heating cycles. If the draft inducer cannot function, your furnace will shut down. 


Moisture is Present in Your Furnace

It isn’t uncommon for a furnace to experience issues with water leaks. As long as the situation is handled by a professional promptly, no serious or permanent damage will result. However, if a water leak in your heating system is ignored, rust can form and deteriorate into holes inside your system. This kind of damage cannot always be repaired. Moisture in your HVAC system will cause short-circuiting and blown fuses. If you suspect that this may be the issue, contact Xenia Heating & Air right away so that one of our HVAC technicians can inspect your system and fix the problem.  


The Furnace’s Gas Valve Isn’t Working

If your furnace is a gas model and it is blowing fuses frequently, there may be a problem with the gas valve. This valve opens and closes to regulate the flow of gas inside your furnace. If it is unable to operate freely as it needs to or if one of the components involved in its operation stops working, your furnace will become overheated. This will not only result in several fuses blowing, but it also presents a dangerous fire hazard.


Your Furnace Needs a New Air Filter

If the air filter in your furnace gets filled with dirt, dust, debris, and other pollutants, it will become so clogged that air will be unable to flow through it. Overheating of your furnace will occur, causing fuses to blow and ultimately resulting in a total shutdown of your HVAC system.

What Does the Air Filter Do?

Your furnace’s air filter collects all of the dirt and potentially harmful substances that are in the air and traps them so that they will not make their way into your home and circulate in the heated air from your furnace.

Why is a Dirty Air Filter Dangerous?

If the air filter in your furnace becomes clogged, airflow will be restricted. As a result, your heating system will become overworked and overheated as it continues to attempt to force air through the clogged filter. When your furnace becomes overheated, it will shut down. Permanent damage to your HVAC system can result.

A Little TLC Goes a Long Way

Once every 30 days, check the air filter and replace it if it is filled with dirt. At least once during the season, when your furnace is in heavy use, make sure you change the air filter. Also, when it is time to turn off your furnace after the cold-weather season has passed, place a new, clean filter in it.


Wrapping It Up: Final Thoughts on Why a Furnace Keeps Blowing Fuses

Most of the time, a blown fuse is an infrequent occurrence and a mild inconvenience, nothing more. However, in some cases, such as when fuses are repeatedly blowing, this is a warning sign that there is a more serious problem with your heating system. The problem could be a number of things: issues with wiring, water inside your furnace, an inoperable gas valve, or a dirty air filter. Do yourself a favor and don’t take any chances. If you are located in Xenia, Ohio, or the surrounding areas, give Xenia Heating & Air a call and let one of our professional HVAC specialists look into the situation right away.


Xenia Heating & Air takes pride in providing our customers with the very best service in the heating and cooling business. If you have any questions or if you’re experiencing issues with your HVAC system, give us a call at (937) 708-8451 one or visit us online to schedule an appointment at your convenience.